<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="https://unpkg.com/vue/dist/vue.js"></script>
    <title>下拉框select绑定-单选</title>
</head>

<body>
    <div id="app">
        <p>勾选的是：{{selected}}</p>
        <select value="" v-model="selected">
            <option selected="selected" disabled >请选择</option>
            <option value="A">A</option>
            <option >B</option>
            <option >C</option>
            <option >D</option>
            <option >E</option>
        </select>
    </div>
    <script>
        var a = new Vue({
            el: '#app',
            data: {
                selected: []
            }
        })
    </script>
</body>

</html>